<div style="height: 100%;overflow-y: auto">
  <div echarts [options]="chartOption" class="demo-chart"></div>
  <div echarts [options]="area" class="demo-chart"></div>
  <div echarts [options]="asd" class="demo-chart"></div>
  <div echarts [options]="asda" class="demo-chart"></div>
</div>
